RMVB or DIXV?

Sorry, I dont know where to post this question so i do it here.2 o4 m* p% V$ A6 G
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I dont know what is the difference between RMVB and DIXV format. Can someone explain? Which one is better in image quality? K# A8 [3 _. V7 e! T
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by the way, I m watching with a LCD TV. Thank you.